Effect of surface density silver nanoplate films toward surface-enhanced Raman scattering enhancement for bisphenol A detection

N A Bakar,A A Umar,J G Shapter,M M Salleh

doi:10.1088/1742-6596/985/1/012026

Abstract

This paper reports a study on surface-enhanced Raman scattering (SERS) phenomenon of triangular silver nanoplate (NP) films towards bisphenol A (BPA) detection. The NP films were prepared using self-assembly technique with four different immersion times; 1 hour, 2 hours, 5 hours, and 8 hours. The SERS measurement was studied by observing the changes in Raman spectra of BPA after BPA absorbed on the NP films. It was found that the Raman intensity of BPA peaks was enhanced by using the prepared SERS substrates. This is clearly indicated that these SERS silver substrates are suitable to sense industrial chemical and potentially used as SERS detector. However, the rate of SERS enhancement is depended on the distribution of NP on the substrate surface.

Highlights

Bisphenol A (BPA) is an organic chemical that is used domestically by the manufacturing plant to produce polycarbonate plastic [1], stabilizer in polyvinyl chloride, epoxy coating, and antioxidant [2]
Surface-enhanced Raman scattering measurement was rapidly developed in sensor technology especially for monitoring contamination of environment and food, in medical and crime
Triangular silver NP films were prepared on a quartz surface using self-assembly technique with four different immersion times which were varied from 1 hour to 8 hours

Summary

Introduction

Bisphenol A (BPA) is an organic chemical that is used domestically by the manufacturing plant to produce polycarbonate plastic [1], stabilizer in polyvinyl chloride, epoxy coating, and antioxidant [2]. We attempt to study the detection of BPA molecule on four SERS substrate using self-build SERS sensor system. These SERS substrates were prepared with various immersion times to obtain different morphologies on substrate surface. 2. Experiment Silver triangular nanoplate (NP) substrates were prepared by depositing silver nanoplate on the quartz surface from a colloidal using self-assembly technique.

Results

Conclusion